30 Second Article on Website Hosting
Your office computer has nothing to do with your web site.
You can buy hosting for about $15 a month. They will provide limited 24 x 7 support. It is still technical of course, but it is a service driven business.
A hosted web site lives on a computer that is in a data center. A large building with thousands of computers and many millions of web sites.
Good hosting companies have security, backup power, and customer service.
Big complicated web sites, or really active web sites (thousands of visits/day), or large companies that are putting their operations on the web will need much more than that.
If you want to manage it yourself, sign up for hosting here: dreamhost.com
(my affiliate link)